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(Last Modified On 10/22/2012)
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(Last Modified On 10/22/2012)
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Species
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ANDROPOGON BICORNIS L.
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PlaceOfPublication
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Sp. P1. 1046. 1753.
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Synonym
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Anatherum bicorne Beauv. Ess. Agrost. 128. 1812. Saccharum bicorne Griseb. Abh. Ges. Wiss. G6ttingen 7:266. 1857. Sorghum bicorne Kuntze, Rev. Gen. P1. 2:791. 1891.
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Description
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Coarse perennial; culms 1-2.5 m. high, erect, in rather large clumps, glabrous; sheaths usually shorter than the internodes or the lower ones overlapping, broad, loose, keeled toward the summit, glabrous; ligule 1-1.5 mm. long, minutely erose- ciliate; blades elongate, 2-5 mm. wide, the lower surface glabrous or the midnerve scabrous, the upper pubescent, the margins very scabrous, especially near the tip; flowering branches numerous from the upper sheaths, very compound, forming a very dense, corymbose feathery inflorescence; racemes paired, 2-3 cm. long, partly enclosed or exserted on long slender peduncles from the narrow inconspicuous spathes, the rachis and sterile pedicels densely hairy, the hairs spreading, as much as 5 mm. long; sessile spikelet 3 mm. long, awnless, glabrous; pedicellate spikelet rudimentary, or occasionally larger than the sessile one.
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Distribution
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Savannas, fields and open hillsides, sometimes in swamps, southern Mexico and the West Indies to Bolivia and Argentina.
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Common
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Rabo de Chibo.
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Specimen
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BOCAS DEL TORO: Water Valley, von Wedel I6I7. CHIRIQUI: El Boquete, Hitchcock 8I82, 8240, 8258; Maxon 5209; Davidson 699; Woodson & Schlery 708. COCLE: between Las Margaritas and El Valle, Woodson, Allen & Seibert I7I4. CANAL ZONE: Toro Point, Hitchcock 805o; Gatun, Hitchcock 7982; Monte Lirio, Maxon 6865; Bohio, Maxon 4769; Frijoles, Piper 5223; Barro Colorado Island, Bailey & Bailey 386; Kenoyer io8; Gamboa, Standley 28469; Empire to Mandinga, Piper 5238, 5250; Culebra, Hitchcock 7938; Mira- flores, Greenman d Greenman 5igg; between Miraflores and Pedro Miguel, Pittier 3967; Ancon Hill, Killip 40I9, 12088; Balboa, Standley 25666. PANAMA: Rio Pescada, Bartlett & Lasser I6607; Chorrera, Hitchcock 8131; Rio Tapia, Standley 28068; Rio Tecuimen, Standley 26643; Taboga Island, Hitchcock 8084.
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